Finding the Fourth Proportional to 105,420.33, 145,388.09 and 74,732.75
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Solution
The fourth proportional to 105,420.33, 145,388.09 and 74,732.75 is: 103,065.99
Step by Step Solution
- Step 1: Write the proportion equation
105,420.33 : 145,388.09 = 74,732.75 : x - Step 2: Convert to fraction form
105,420.33/145,388.09 = 74,732.75/x - Step 3: Cross multiply
105,420.33x = 145,388.09 × 74,732.75 - Step 4: Simplify right side
105,420.33x = 10,865,250,682.34 - Step 5: Solve for x
x = 10,865,250,682.34/105,420.33 - Step 6: Final answer
x = 103,065.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.